Peel off thermometer from backing and place on the side of the body deep in the armpit (axilla). Lower the arm and hold closed. Wait 2-3 minutes for the first temperature measurement. Lift arm to read. Thereafter reading are virtually instant - just lift arm to take the next measurement. Note: The thermometer will adhere to the armpit through bathing and may be left in place for up to 48 hours on normal, healthy, intact skin. To remove: Gently peel off and discard thermometer. Do not reuse. To read: Look at the temperature grid. The last dot to turn Black indicates the correct temperature. Normal axillary temperature range is 97.0 degrees F to 98.6 degrees F.